I don't know how it does for fish, but I've heard nothing but good stuff on this product.

Down here in Louisiana, it's gonna get a good test. It's already passed one test my neighbor put it to. He suggested I use it so "my mosquitoes" won't be flying over to "his" yard . . .

Hmmmm... either they're gonna sell a lot of it here in my neighborhood, or we'll have to "draw a line somewhere" .. . . LOL

Pros: GR8 Reports I've heard

Cons: none known

Since the racoons ate my fish, I had a mosquito problem. I have been using these things for about 4 years and they really do work.

Pros: effective

Cons: none

We use these in our pond, to keep mosquito population down. I think the mosquito is the official Dare County bird.... Anyhow, it is good for the dogs and humans in our house, and probably good for the fish, too.

Pros: Just toss it in!

Cons: none

I just add a floating disc to my donkeys water trough and it kills mosquito larvae away. This product is not harmful to my donkeys.

Pros: Doesn't harm my miniature donkeys

Cons: None

I have used this in barrel gardens to small to suport fish life. Stops the nasty buggers from developing.

Pros: safe for wildlife and fish, kills mosquitos

Cons: a little pricey